Knife mechanism drive for a buttonhole sewing machine

Details Knife mechanism drive for a buttonhole sewing machine Knife mechanism drive for a buttonhole sewing machine

1996-09-24

1997-12-02

Nerbun, Peter

Sewing

Special machines

Buttonhole

1122641, D05B 3706, D05B 306

Patent

active

056924470

ABSTRACT:
A grooved barrel cam is mounted on a needle bar drive shaft. As the last step, after stitching is completed and power is removed, an engaging arm inserts a follower pin into the cam. A knife cam follower lever drives a knife drive shaft and a knife driving lever. The knife driving lever drives a knife holder downward. A connector at a middle of the knife holder maintains the holder vertical. A knife is secured at the bottom of the knife holder. The cam and a tension spring angularly return the cam follower lever, the shaft and the knife lever and lift the holder, when the cut has been completed. A compression spring around the knife drive shaft moves the follower away from the cam once the engaging arm has released the follower. Engaging the knife cam follower and operating the knife driving mechanism on the last revolution after the clutch is released helps exhaust the kinetic energy of the sewing machine before bringing the machine to a stop.

REFERENCES:
patent: 498216 (1893-05-01), Reece
patent: 581031 (1897-05-01), Ostrom
patent: 649870 (1900-05-01), Hogan
patent: 655637 (1900-08-01), Reece
patent: 856014 (1907-06-01), Allen et al.
patent: 1473240 (1923-11-01), McCann
patent: 1669912 (1928-05-01), Reece
patent: 1738868 (1929-12-01), Carlson
patent: 1771670 (1930-07-01), Carlson
patent: 2063398 (1936-12-01), Pikul et al.
patent: 2174294 (1939-09-01), Spaine
patent: 2273242 (1942-02-01), Wood
patent: 2367187 (1945-01-01), Collins
patent: 4181083 (1980-01-01), Bajer et al.
patent: 5067422 (1991-11-01), Sakuma
patent: 5085157 (1992-02-01), Jung et al.

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